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USA 253, 40099

Orbit data source: Space-Track

USA 253, 40099 is a payload satellite owned by USAF AFSPC (US) in GEO that was launched on Mon, 28 Jul 2014 UTC via a DELTA 4M+(4,2) launch vehicle from the Air Force Eastern Test Range (AFETR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

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<iframe src="https://www.satcat.com/sats-embedded/40099?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/40099?theme=dark&initialShowStats=false

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Identifier

40099, 2014-043A

Orbit

GEO

Country

Related business

United States Air Force (US)

Manufacturer

OSC

Mission

Non-operational Defense Classified

Bus & Motor

GEOSTAR-1, AOCS

Mass

500 kg wet, 500 kg dry

Launch date (UTC)

2014-07-28 (11 years ago)

Launch vehicle

DELTA 4M+(4,2)

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan, 2.5 m

Radar Cross Section

7.621 m²

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Last TLE update: 1 week ago

TLE from 1 week ago

0 USA 253
1 40099U 14043A   25336.27429300 -.00000057  00000-0  00000+0 0  9992
2 40099   4.9810  77.6308 0003901 139.0000 239.5552  0.96773240 25469

Epoch: 2025-12-02T06:34Z

TLE epoch observation values (Epoch: 2025-12-02T06:34:58.915Z)

Latitude

1.59804°

Longitude

-74.04926°

Altitude

36,804.749 km

Speed

3.038 km/s

True Right ascension

06h 24m 13s

True Declination

1° 35' 47"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

21:33:17

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

36,814.672 km

Perigee altitude

36,780.986 km

Semi-major axis

43,175.966 km

Eccentricity

0.00039

Inclination

4.981°

RAAN

77.6308°

Arg. of periapsis

139°

True anomaly

239.51667°

Mean anomaly

239.5552°

Eccentric anomaly

239.53593°

Mean motion

0.24192 °/min

Orbital period

1,488.07 mins

BSTAR

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Other satellites on launch #43 in the year 2014 (2014-07-28 UTC)

USA 254, 40100

USA 255, 40101

DELTA 4 R/B, 40102

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USA 253 Visibility forecast

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Span	Click to sort rows by Start time (UTC) header in descending order	Start Az.	Max El. time (UTC)	Max El. Az.	Max El.	End time (UTC)	End Az.
1429 mins	2025-12-08 23:21:53.990Z	243.508° WSW	2025-12-08 23:21:53.990Z	243.508° WSW	17.604°	2025-12-09 23:10:53.990Z	253.914° W

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40099 neighbors

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out USA 253, 40099 on other resources

View USA 253, 40099 on NASA - NSSDCA Website

View USA 253, 40099 on Heavens-Above

View USA 253, 40099 on Keep Track

View USA 253, 40099 on Celestrak

View USA 253, 40099 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

USA 253, 40099

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 1 week ago

TLE from 1 week ago

TLE epoch observation values (Epoch: 2025-12-02T06:34:58.915Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #43 in the year 2014 (2014-07-28 UTC)

USA 253 Visibility forecast

40099 neighbors

Co-orbital & Co-planar RSOs

Check out USA 253, 40099 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 1 week ago